The nature of singular coexistence-curve diameters of liquid-liquid phase equilibria

被引：82

作者：

Cerdeirina, Claudio A.

Anisimov, Mikhail A. ^{[1
]}

Sengers, Jan V.

机构：

[1] Univ Maryland, Dept Chem & Biomol Engn, College Pk, MD 20742 USA

[2] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA

[3] Univ Vigo, Dept Fis Aplicada, Orense 32004, Spain

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 424卷 / 4-6期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/j.cplett.2006.04.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have examined experimental consequences of 'complete scaling', recently formulated by Fisher and co-workers [Phys. Rev. Lett. 85 (2000) 696; Phys. Rev. E 67 (2003) 061506], when extended to liquid-liquid coexistence in binary mixtures. A controversial issue of the proper definition of the order parameter in liquid mixtures is resolved. We show that a 'singular' diameter of liquid-liquid coexistence curves originates from two different sources: one is associated with a correlation between concentration and entropy, whereas another one is a correlation between concentration and molar density, generating a lower-order, and thus a more significant singular term. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：414 / 419

页数：6

共 27 条

[1] The measurements of coexistence curves and turbidity for {xC6H5NO2+(1-x)CH3(CH2)9CH3} in the critical region [J].